The police have cordon off the town centre .

警察用警戒线围住市中心。

The final footage of him alive shows him walking past the line of police dog handlers, who have formed a cordon blocking off Royal Exchange passage.

他生前的最后一段画面显示他走过一列牵着警犬、围成警戒线堵住人群的警察。

Mr Lai is said to have then broken through the police cordon, climbed to where Mr Chen sat, greeted him with a handshake - and then pushed him off the edge.

赖先生据说当时冲破警察的警戒线，爬到陈先生所坐的地方，与其握手，然后把他推下去。

A 200m cordon was put in place, cutting off one of London's major transport arteries and causing further traffic chaos, after reports of the suspicious vehicle.

在报道有可疑车辆后，一条200米长的警戎线切断了伦敦一条主要的交通要道，造成更大的交通混乱。

That, I assumed, would cordon me off from the Net and keep me from spreading the bug while I figured out how to get rid of it.

我想这样一来就可以切断与因特网的联系，不至于传播病毒，再想办法清除。